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Old 06-25-2005, 07:12 PM   #1
Jimpreza
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Default catalytic or O2?

check engine light came on and so i had a diagnostic done on the car. it came back with OBDII code of P1133...oxygen sensor failure... i was just gonna get the new O2 sensor and hope the light turned off, but was informed that if it didnt, a new converter would need to be installed. today i was parking, got out of my car and heard my stock exhaust making like a putting noise... i leaned down next to it and it smelled pretty strong... is this an indication that a new catalytic converter should be purchased or will a new O2 sensor change the way that the exhaust is running and smelling. if those arent right then what are the correct signs indicating catalytic converter failure?
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Old 06-25-2005, 07:31 PM   #2
Handsdown
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for future reference, it's probably not a good idea to sniff your exhaust fumes.


i'd take it into an inspection station and have them measure the carbon monoxide levels just to make sure whether or not you need a new cat.

by the way, o3 and CO are odorless, so if you smelled anything it's hydrocarbons and... well look it's just not a good idea to sniff your exhaust gasses, even if it's just for a second to see what it smells like. take it in and have the exhaust gas measured for cat efficiency.

it's the same test they do for inspection, sticking the little exhaust probe up your muffler.

a new 02 sensor is going to run 250+, and same with a new cat section. so if you can save doing both by a drive to the local inspection station, you're going to be doing yourself a huge favor.
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Old 06-25-2005, 07:36 PM   #3
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LMAO...i know its not a good idea... i dont like huff it or anything...lol it just caught my attention and it dint smell like the regular exhaust fumes...
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Old 06-25-2005, 07:39 PM   #4
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of course the next logical question is "how do you know what regular exhaust fumes smell like?"

but yeah, what i'm trying to say is that most of the fumes that catalysts convert are odorless, so you really have to test it with a diagnostic probe. (i must say, though, sticking your face into the exhaust stream and smelling something odd doesn't bode well...)

take the time to figure it out and fix it the right way and you'll really be better off.
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Old 06-25-2005, 07:43 PM   #5
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lol...thanks...would any garage have the probe? and can i just show up to inspection even when im not scheduled to have one?
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Old 06-25-2005, 08:00 PM   #6
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dunno, you might want to call someplace and say you think your cat is not working as well as it should and you want to have it checked. they'll tell you what to do. you might need an appointment, it will depend on the shop.
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Old 06-25-2005, 08:06 PM   #7
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thanks alot...if anyone else has any advice, feel free to comment on the situation at hand
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Old 06-25-2005, 08:59 PM   #8
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Quote:
Originally Posted by Jimpreza
thanks alot...if anyone else has any advice, feel free to comment on the situation at hand
I just cleared a P1133 last week by replacing the front O2 sensor. Now it runs a lot stronger, much better throttle response and mpg went from 22.5 to 24.5!
I got a pretty good deal on the sensor ($99+shipping) at Sparkplugs.com. Half our job.
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Old 06-25-2005, 10:58 PM   #9
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i found a bosch O2 sensor, before the catalytic converter, at autozone for 65.99...is this different from what everybody else is looking at and purchasing? everyone is talking about it being $99.00 and $158.00+...
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Old 06-25-2005, 11:19 PM   #10
Jose O Perez
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Try http://www.oxygensensors.com That's were I bought mine, you can have the OEM ones (plug and play) or the universals, were you have to crimp here and there but pretty easy. I found them to be the cheapest around. Good luck.
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Old 06-25-2005, 11:38 PM   #11
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Quote:
Originally Posted by Jimpreza
i found a bosch O2 sensor, before the catalytic converter, at autozone for 65.99...is this different from what everybody else is looking at and purchasing? everyone is talking about it being $99.00 and $158.00+...

The difference is that the cheap ones are universals and you have to splice the wires to your connector. Denso is the OE manuafacturer and the one I got for my 2000 OBS EJ22 (Denso 234-9018) was a perfect match. No splicing required. Five miles of normal driving and the CEL went out. The best online price I saw on the Subaru part was about $120 at discount.
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Old 06-26-2005, 12:25 AM   #12
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the one at autozone was a bosch oe plug for 65-...free shipping...might get it
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Old 06-26-2005, 11:58 PM   #13
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bump...
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Old 07-06-2005, 08:29 PM   #14
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If it's the cat you'd probably throw a cat inefficiency code... not an o2 code.
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